Gallium Arsenide Microwave Amplifier.
This is a Celeritek CTR-990126 CPW microwave transceiver, and there's a stunningly beautiful little city inside. The input and output are not wires: They are waveguides, hollow tubes that the signal travels through as an electromagnetic wave. You can see the miniature antennas that pick up the signal from the waveguide at the bottom left and right of the picture, or at the top and bottom of the Spin video.
Look at the next sample to see the circuitry up close.Source:eBay seller time-warpContributor:Theodore GrayAcquired:24 March, 2009Text Updated:25 March, 2009Price: $50Size: 4"Composition:GaAs